Split roll for briquetting machines or the like



1948. e. M. DALLAS ET AL SPLIT ROLL FOR BRIQUETING MACHINES OR THE LIKEFiled Sept. 5, 1947 3 Sheets-Sheet l INVEN TORS: 600199111. Dal/m9;

G. M. DALLAS ET AL 2,455,980

SPLIT ROLL FOR BRIQUETING MACHINES OR THE LIKE Dec. 14, 1948.

3 Sheets-Sheet 2 Filed Sept. 5, 1947 INVENTORSI George I1- Dal/(28% Bemu/i114 -FIII e,

ATTORNEYS.

m a m Dec. 14, 1948. DALLAS E AL 2,455,980

SPLIT ROLL FOR BRIQUETING MACHINES OR THE LIKE Filed Sept; 5, 1947 3Sheets-Sheet 3 WITNESSES 21 INVENTORS! ATTORNEYS.

' followshereinafter, having reference Patented Dec. 14, 1948 sr'LrrROLL FOR BRIQUETTING MACHINES I OR THE LIKE Georg'e'Mifliin Dallas andBernard M. Fine, Philadelphia, Pa.-, .assignors to American Briquet:,Company,-Phi1adelphia, Pa., a corporation of Delaware 1 ApplicationSeptember 5, 1947, Serial No. 772,436

11 Claims. (c1.--1's21) 1 This invention relates tosplit-rolls for:briquet ting machines or the like andmore particularlyto pressure rollsthe surfaces whereof are subject to considerable wear necessitatingperiodic replacement or repair. I 1

In briquetting machines it is customary to emlploy pressure rollsbetween which the briquets are molded, each consisting of ahollowcylindrical shell which is shrunk on and keyed to a cen tral bodyaffixed to a shaft.

necessary to replace a Worn roll it isa most diflicult and. laboriousoperation to remove the roll from the machine because it 'requires theincidental disassembly of a large portion of the machine. Moreover, itis an expensive and timeconsuming operation, after the rolls have beenthusre'moved from the machine, to replace or repair the'worn shells andto reassemble the parts of the roll and of the machine.

The principalobject of the present invention is.

to overcome-the above recited difficulties and this end we accomplish bythe provision of a pressure roll having asplitouter shell consisting ofanumber of arcuate segments and means whereby such segments may besecurely attached to the body of the roll andto each other,'and*yet.bei

readily removable so thatas they'become worn they-'rnay be withdrawn andreplaced, with .the rolls remaining in position within the machine; allwithout requiring disassembly of. other parts of the machine.-: 1-

Still'otherobjects and advantages of the invention, includingthose'derived from simplicity of.

manufacture and ease -of' ass'embly of. the'constituent parts of thepressureroll, will become more fully'apparent from the detaileddescriptions ofa preferred embodiment of the invention which companyingdrawings.

f the drawings:

Fig. 1 represents aside elevation of a briquettingmachine equipped withsplit rolls embodying our'invention; "1"]. s: Fig. 2 represents avertical cross sectional View of r the same taken as indicated bythearrows ill-11 of Fig'l; w L w Fig.3 represents'anenlarged-endelevation of one of the pressure rollsof themachine, theshaft to which it 'is' splined being shown in'cross sec tion; T r

Fig. 4 represents a rows IV f IV of -l ig. 3;

Fig. 5 represents 'I hese rolls are of. considerable size and weightand'when it becomes to the ac-' longitudinal cross section of thepressure roll taken as'indi-cated by the 'ar"-' a partial longitudinalsection I of the same taken as indicated 'by the arrow VV of Fig. 3;

Fig. 6 represents a transverse section of the pressureroll taken asindicated by the arrows VIVI of Fig. 4;

'Fig. 7 represents a further enlarged transverse section of a portion ofthepressure roll, showing the position of the parts of the rollpreparatory to their assembly.

Fig. 8 represents an enlarged perspective view I of one of the wedgeblocks associated with the" .pressure roll.

The-briquetting machine shown in. Figs. 1 and 201 the drawings is of aconventional type, ex-' cept for the incorporation therein of pressurerolls' embodying our invention. Fine coal is fed to the machine througha horizontal conveyor 1 and a rotary hopper diagrammatically indicatedat 2. Briquets are discharged from the machine and carried to freightcars or trucks by means of an endless conveyor belt 3 passing over beltrollers 4 and driven by a motor 5.

The two pressure rolls 6 are driven from a suitable source of power (notshown) through a drive belt! which engages a sheave-8, the latter beingconnected to a shaft 9 by a friction clutch H.

On the shaft 9 there is a pinion l2 meshing with a large spur gear 13.Spur gear I3 is mounted on' a shaft having-a pinion l5 which meshes witha similar pinion l6 mounted on shaft l1.

At the opposite side of the machine shaft l1 car-' ries another similarpinion l8. Pinions l5 and I8 respectively drive two large gears I9 and20 attached to the shafts 2| of the pressure rolls 6 and cause suchrolls to berotated at the same speed in opposite directions.

The shafts 2| of pressure rolls 5 have their ends mounted inhorizontally movable bearing blocks 22 suitably guided and supported byside frame elements 23 and 24 secured to the foundation 25 of themachine. Rods 26 pass through the side frame elements 23 and 24 and areprovided with nuts 21 which serveto maintain the spring caps 28in anadjustable fixed relation to the machine. Groups of springs 29a, 29bbear against the spring caps 28 at their outer ends and against movablepressure plates 3| at their inner ends, the intermediate springs 29b ofeach group being retained in position by rods 32 and secured to thespring caps 28 bynuts' 33. ing under the influence of the springs 29a,29b urge the bearing blocks 22, which extend through the tie plates 30at each end of the side frames,

towards each other and hence maintain the pressure. rolls 36 in closerelation to each:

The pressure plates 3| actcluding spring caps 28, springs 29a, 2%pressure plates 31 and bearing blocks22". In-view'oi the size and Weightotthese parts this is a difiieult and laborious operation. Butlas morefully ens plained hereinafter the pressure rolls. dare so designed,constructed and assem-me'dthat'they need not be removed from the machineeven after long periods of service.

As shown in Figs. 3, 4, and 5 each pressure roll 6 consists of agenerally cylindricalbody 39 and an outer shell consisting of twoarcuate segments Ma, Mb removably attached toithe-body 39. In theparticular embodiment selected for illustration, the body 39 consists oftwo sections 39a, 391) (see Fig. 4) fitting overtheinedial portion ofthe shaft 21, one at each side'of a collar 42 at/the longitudinal centerof such. medial .portion of the shaft. The body sections 39a, 391) aresplined to the shaft-2| by a key 43 and are secured to each other bybolts 44, washers 45 and nuts 46. Each body section 39a, 391)" has twoperimetric cavities 41 extendingaxially and substantially throughout thelength of the-rolls. Within each perimetric cavity 41- a series of wedgeblocks 48 are accommodated in end. to end relation. After assemblyof-thebody sections 39a, 391) it is generally desirable to securethe-nuts 46 in place by welding, as shown at 49.

As shown more clearly in Figs. 6, '7 and 8 the wedge blocks 48 have nutportions '50 of gen erally rectangular shape with flanges 5| which arehoused and fitted within the cavities 41 so as to restrain the wedgeblocks against-rotation, but with capacity for outward radial'rnovementlimited by the engagement of the flanges 5| with the internalshoulders 52 of the-cavities. Each wedge block 48 has outwardlyprojectinglugs 53 which engage interiorrecess'es 54in the-segments Ma,MD of the outer shell, and each Wedge block is threaded, as a nut, toreceive the correspond.- ingly threaded ends of bolts 55. The wedgeblocks 48 are inserted within the cavities Albe fore assembly of thebody sections 99a, 3% upon the shaft 25.

g The outer shell segments M a, d'lb-areprovideda with rows ofcup-shaped depressionsu56 distributed over their surfaces andconstituting con jugate molds within which the briquets are formed. Itwill be understood'that the particu'. lar configuration of thedepressions 55 maybe greatly varied. Preferably the interior recesses 54which receive the outwardly projecting lugs" 53 of the wedge blocks areformedxadiacenttm the meeting edges of the arcuate' segments? lla, Mb sothat the wedge blocks span thewjointslo'f the shell. By providinginclined surfaces-5l-at the sides of the recesses54 adjacent-to thejoints, and by similarly inclining thecorresponding:faces of the lugs53, as'the wedge blocksi lfil arerdrawn outwardly into engagement withthe shell-segments the wedge shaped lugs 53- will tend: to press theshell segments towards each other: at'the joints. I

Desirably the bolts 5'5 are disposed at the joints:

of the outer shell, as shown most-clearly inv Fig-L.

4 buried at the bases of certain of the cup-shaped depressions 56. Thebolt heads 59 are ground at the top, as indicated at 62, to conform tothe curvature of the depressions 56 and are provided with sockets 63 sothat they may be engaged by a wrench for turning. The sockets 63 and thetops of the bolt heads 59 may be filled and coated with tin or Babbittmetal or the like. Likewise the annular space 54 surrounding the boltheads 59 may be filled with Babbitt metal or the like after the parts ofthe roll are fully assembled,

thuspreventing the bolts 55 from turning and in -th'e: adjoining wallsof the shell segments Ma, Mb, as indicated-at 65, and by knurling thebolt heads 59 it isinsu-red that the bolts will be firmly locked inposition so that they cannot become dislodged. Whenever it may bedesired to remove the shell segments lla, Mb it is a relatively simplematter to burn out the Babbitt metal ori other material around the boltheads- 59', which are, then'readily accessible and free for turning, sothat'the bolts may lee-Withdrawn and the parts of the rolls may bedisassembled It will be apparent that allpartsof-the pressure roll of.our invention which interconnectthe con-- stituent elements of the rollare designed-so that they may be cheaply manufactured and yet: beeffective to maintain such elements firmly se cured in interlockedrelation to each other. The operations of assembly and disassembly maybeperformed with ease by means ofsimple tools and without the necessity ofremoving the rolls from theirpo-sitions within the machine. U

Although we'have illustrated and described only one specific embodimentof our invention as applied to a particular kind of machine, it will bereadily apparent that the invention-may be applied to various types ofrolls other than thepressure rol1s= ofa briquetting machine; also thatnumerous modifications and variations may be made in the form of thebody andouter shellsections,.and in the means for interconnecting. suchelements, including reversals'of parts; and that ;.certain features ofthe invention may attimes be used to advantage without the use of otherfeatures, all without departing from the spirit of our invention asdefined in theannexedclaims.

Having thus described our invention-we.claims 1. A roll for abriquetting machine or the like comprising a generally cylindrical" bodyhaving perimet'ric' cavities, wedge: blocks having portionshoused withinsaid cavities with capacity for limited radial movement thereinandhaving outwardly projecting lugs, acylindrical shell surrounding saidbody and consistingv of-arcuate segments interiorly recessed toreceive-the outwardly projecting lugs of said wedge blocks and boltingmeans passing through.=saidshell and engaging said wedge blocks'tosecuresaid arcuate segments in firm" engagement. with said body.

2. A roll for a briquetting machineorthelikecomprising a shaft having acollar'at its medial portion; a'bo'dy consisting of: generallycylindrical sections keyed to said shaft on.:each.sid'e of saidcollarand secured toeach other,.=said-body having perimetric cavities,wedge-blocks=-having: portions housed within. said *cavitieswitlrcapacity for limited radial movement therein and having. outwardlyprojecting lugs, ,a cylindrical shell-surrounding said body andconsisting of arcuate seg-* ments interiorly recessed torreceivef the'outwardly projecting: lugs of :saidzwedg blocks; and. bolting Bydrilling holes means passing through said shell and engaging said wedgeblocks to secure said arcuate segments in firm engagment with said body.

3. A roll for a briquetting machine or the like comprising a generallycylindrical body having axially extending cavities at its perimeter,wedge blocks having nut portions fitting within said cavities withcapacity for limited radial movement, but restrained against rotationtherein, and having outwardly projecting lugs, a cylindrical shellsurrounding said body and consisting of arcuate segments interiorlyrecessed to receive outwardly projecting lugs of said wedge blocks, andbolting means passing through said shell and having threads engaging thenut portions of said wedge blocks to secure said arcuate segments infirm engagement with said body.

4. A roll for a briquetting machine or the like comprising a generallycylindrical body having shouldered cavities extending axiallysubstantially throughout the length thereof at its perimeter, a seriesof Wedge blocks disposed end to end through said cavities, said wedgeblocks having nut portions fitting within said cavities with capacityfor limited radial movement, but restrained against rotation therein,and having outwardly projecting lugs, a cylindrical shell surroundingsaid body and consisting of arcuate segments interiorly recessed toreceive the outwardly projecting lugs of said wedge blocks, and boltingmeans passing through said shell and having threads engaging the nutportions of said wedge blocks to secure said arcuate segments in firmengagement with said body.

5. A roll for a briquetting machine or the like comprising a generallycylindrical body having perimetric cavities, wedge blocks havingportions housed within said cavities with capacity for limited radialmovement therein and having outwardly projecting wedge-shaped lugs, acylindrical shell surrounding said body and consisting of arcuatesegments interiorly recessed to receive the outwardly projecting lugs ofsaid wedge blocks, and bolting means passing through said shell andengaging said wedge blocks to secure said arcuate segments in firmengagement with said body and in firm engagement with each other, thelatter by virtue of the wedging action of said lugs in the recesses ofsaid arcuate segments.

6. A roll for a briquetting machine or the like comprising a generallycylindrical body having perimetric cavities, wedge blocks havingportions housed within said cavities with capacity for limited radialmovement therein and having circumferentially spaced outwardlyprojecting lugs, a cylindrical shell surrounding said body andconsisting of arcuate segments with interior recesses formed adjacent totheir meeting edges to receive the outwardly projecting lugs of saidwedge blocks, said spaced lugs spanning the joints of said arcuatesegments, and bolting means passing through said shell to secure saidarcuate segments in firm engagement with said body and with'each other.

7. A roll for a briquetting machine orthe like comprising a generallycylindrical body having perimetric cavities, blocks having nut portionshoused within said cavities with. capacity for lim ited radial movementtherein, a cylindrical shell surrounding said body and having a seriesof depressions distributed over its outer surface to form molds formaterial to be molded, said shell consisting of a. plurality of arcuatesegments, and

bolts passing through said shell, each such bolt being in threadedengagement with the nut portion of one of said blocks and having itshead accessible at the base of one of said depressions.

8. A roll for a briquetting machine or the like comprising a generallycylindrical body having perimetric cavities, blocks having nut portionshoused within said cavities, a cylindrical shell surrounding said bodyand having rows of cupshaped depressions distributed over its outersurface to form molds for material to be molded, said shell consistingof a plurality of arcuate segments having their edges joined along linesextending through the centers of certain of said rows of cup-shapeddepressions, and bolts passing through said shell at the joints thereof,said bolts being in threaded engagement with the nut portions of saidblocks and having their heads accessible at the bases of saiddepressions at the joints of said shell.

9. A roll for a briquetting machine or the like comprising a generallycylindrical body having perimetric cavities, blocks having nut portionshoused within said cavities, a cylindrical shell surrounding said bodyand having a series of cup-shaped depressions distributed over its outersurface to form molds for material to be molded, said shell consistingof a plurality of arcuate segments, bolts passing through said shell,said bolts being in threaded engagement with the nut portions of saidblocks and having their heads buried at the bases of certain of saidcup-shaped depressions and having concavities at their top surfacesconforming to the curvature of said cupshaped depressions.

10. A roll for a briquetting machine or the like comprising a generallycylindrical body having perimetric cavities, blocks having nut portionshoused within said cavities,'a cylindrical shell surrounding said bodyand having a series of cup-shaped depressions distributed over its outersurfaces to form molds for material to be molded, said shell consistingof a plurality of arcuate segments with bolt holes formed at theirmeeting edges, bolts passing through said holes to engage the nutportions of said blocks and having knurled heads buried within said boltholes at the bases of certain of said cup-shaped depressions, theannular spaces between said bolt heads and bolt holes being filled withremovable hard material.

11. A roll for a briquetting machine or the like comprising a shaft, abody consisting of generally cylindrical sections keyed to said shaftand secured to each other, said body having axially extending perimetriccavities, wedge blocks having portions housed within said cavities withcapacity for limited radial movement therein and having outwardlyprojecting lugs, said perimetric cavities being closed at the ends ofthe body of the roll but open at the joints between the roll sections,whereby the wedge blocks may be inserted in said cavities prior toassembly of the roll sections, a cylindrical shell surrounding said bodyand consisting of arcuate segments interiorly recessed to receive theoutwardly projecting lugs of said wedge blocks, and bolting meanspassing through said shell and engaging said wedge blocks to secure saidarcuate segments in firm engagement with said body.

GEORGE MIFFLIN DALLAS. BERNARD M. FINE.

No references cited.

